[ICOM] OK, so has anybody on here replace the trimmer caps on the IC-471? any other work?

Tue May 29 16:17:37 EDT 2018

The problem of trimmers is oxidation at the place where rotors and stators touch each other. It can be cured (temporarily?) by just rotating a rotor a few times back and forth around its normal position until the oxidation layer is destroyed. I am not sure about IC-471, but I made such a "massage" to an IC-761 and turned it back to life without replacing trimmers.
I am afraid, a VHF rig is way more sensitive to misalignment than a HF one, but if it's dead anyway and there were clear signs of trimmers' deterioration,  one may try cleaning trimmers' surfaces. Just clearly note a current position of a rotor and make sure, you put it back to the same position after the rotation. The ideal situation is to adjust trimmers for proper HF output voltage after their rotation and/or replacement, but you still need a service manual for that... The trimmers should be rotated strictly one by one. Needless to say, you need a dielectric screwdriver. 
Hope it helps.

73,
Vlad VE3TM

-- 

-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On Behalf Of Jerry W9fs
Sent: Tuesday, May 29, 2018 3:47 PM
To: ICOM Reflector
Subject: Re: [ICOM] OK, so has anybody on here replace the trimmer caps on the IC-471? any other work?

He doesn't want to tackle it, and being a technician I understand why. He would have to charge me more than I had to pay for my first car. I would like to know what others know before I make it worse, I have some trimmers ordered and not sure they will physically fit, trying to knock the learning curve down some. It would help if Icom had a maintenance manual. They never had one out the door to the public. There are a couple of sites on the web that claim to have one, but be careful, they are not safe, do not download anything WARNING!!!! I have been assured there is no manual by someone I trust completely, Pete "the manual man"

Jerry W9FS 

----- Original Message -----
From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: ICOM Reflector <icom at mailman.qth.net>
Sent: 5/29/2018 1:59:30 PM
Subject: Re: [ICOM] OK, so has anybody on here replace the trimmer caps on the IC-471? any other work?
________________________________________________________________________________

I suspect that Scott Malcolm at MTS could probably do it for you.  I hope the following URL still works.

(http://www.angelfire.com/biz2/mts/)

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~ 73 - Mac, K2GKK/5 ~
~ (Since 30 Nov 53) ~
~ k2gkk hotmail com ~
~ Oklahoma City, OK ~
~ USAF & FAA, Ret'd ~
~ Icom User a/o '72 ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

________________________________
From: icom-bounces at mailman.qth.net <icom-bounces at mailman.qth.net> on behalf of Jerry W9fs <w9fs_reflector at comcast.net>
Sent: Tuesday, May 29, 2018 12:53
To: ICOM Reflector
Subject: [ICOM] OK, so has anybody on here replace the trimmer caps on the IC-471? any other work?

Ok, so there is no maintenance manual! wonder if anybody has worked on it and
may have so helpful suggestions?

Thanks in advance,

Jerry W9FS
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Ficom%2F&data=02%7C01%7C%7C603964b96634464e5a7308d5c58d1a74%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636632132179420077&sdata=5TzMjQZhSy6Bh6jFh47Qdp7KLOJPJ2eqJhSrY99lb%2B8%3D&reserved=0
To support QSL/QTH.net: https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7C603964b96634464e5a7308d5c58d1a74%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636632132179420077&sdata=ak6i3kIRBfJyUVuKEAzocF4on2XEar9AGsbA%2FupySR0%3D&reserved=0
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html

----- Original Message -----
From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: ICOM Reflector <icom at mailman.qth.net>
Sent: 5/29/2018 1:59:30 PM
Subject: Re: [ICOM] OK, so has anybody on here replace the trimmer caps on the IC-471? any other work?
________________________________________________________________________________

I suspect that Scott Malcolm at MTS could probably do it for you.  I hope the following URL still works.

(http://www.angelfire.com/biz2/mts/)

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~ 73 - Mac, K2GKK/5 ~
~ (Since 30 Nov 53) ~
~ k2gkk hotmail com ~
~ Oklahoma City, OK ~
~ USAF & FAA, Ret'd ~
~ Icom User a/o '72 ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

________________________________
From: icom-bounces at mailman.qth.net <icom-bounces at mailman.qth.net> on behalf of Jerry W9fs <w9fs_reflector at comcast.net>
Sent: Tuesday, May 29, 2018 12:53
To: ICOM Reflector
Subject: [ICOM] OK, so has anybody on here replace the trimmer caps on the IC-471? any other work?

Ok, so there is no maintenance manual! wonder if anybody has worked on it and
may have so helpful suggestions?

Thanks in advance,

Jerry W9FS
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Ficom%2F&data=02%7C01%7C%7C603964b96634464e5a7308d5c58d1a74%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636632132179420077&sdata=5TzMjQZhSy6Bh6jFh47Qdp7KLOJPJ2eqJhSrY99lb%2B8%3D&reserved=0
To support QSL/QTH.net: https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7C603964b96634464e5a7308d5c58d1a74%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636632132179420077&sdata=ak6i3kIRBfJyUVuKEAzocF4on2XEar9AGsbA%2FupySR0%3D&reserved=0
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html